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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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26 * Copyright (c) 2012, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 #define DEBUG_SUBSYSTEM S_LOV
35 #include "../../include/linux/libcfs/libcfs.h"
37 #include "../include/obd_class.h"
38 #include "lov_internal.h"
40 /** Merge the lock value block(&lvb) attributes and KMS from each of the
41 * stripes in a file into a single lvb. It is expected that the caller
42 * initializes the current atime, mtime, ctime to avoid regressing a more
43 * uptodate time on the local client.
45 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
46 struct ost_lvb *lvb, __u64 *kms_place)
51 s64 current_mtime = lvb->lvb_mtime;
52 s64 current_atime = lvb->lvb_atime;
53 s64 current_ctime = lvb->lvb_ctime;
57 assert_spin_locked(&lsm->lsm_lock);
58 LASSERT(lsm->lsm_lock_owner == current_pid());
60 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s=%llu m=%llu a=%llu c=%llu b=%llu\n",
61 POSTID(&lsm->lsm_oi), lvb->lvb_size, lvb->lvb_mtime,
62 lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks);
63 for (i = 0; i < lsm->lsm_stripe_count; i++) {
64 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
65 u64 lov_size, tmpsize;
67 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
68 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
72 tmpsize = loi->loi_kms;
73 lov_size = lov_stripe_size(lsm, tmpsize, i);
77 if (loi->loi_lvb.lvb_size > tmpsize)
78 tmpsize = loi->loi_lvb.lvb_size;
80 lov_size = lov_stripe_size(lsm, tmpsize, i);
83 /* merge blocks, mtime, atime */
84 blocks += loi->loi_lvb.lvb_blocks;
85 if (loi->loi_lvb.lvb_mtime > current_mtime)
86 current_mtime = loi->loi_lvb.lvb_mtime;
87 if (loi->loi_lvb.lvb_atime > current_atime)
88 current_atime = loi->loi_lvb.lvb_atime;
89 if (loi->loi_lvb.lvb_ctime > current_ctime)
90 current_ctime = loi->loi_lvb.lvb_ctime;
92 CDEBUG(D_INODE, "MDT ID "DOSTID" on OST[%u]: s=%llu m=%llu a=%llu c=%llu b=%llu\n",
93 POSTID(&lsm->lsm_oi), loi->loi_ost_idx,
94 loi->loi_lvb.lvb_size, loi->loi_lvb.lvb_mtime,
95 loi->loi_lvb.lvb_atime, loi->loi_lvb.lvb_ctime,
96 loi->loi_lvb.lvb_blocks);
100 lvb->lvb_size = size;
101 lvb->lvb_blocks = blocks;
102 lvb->lvb_mtime = current_mtime;
103 lvb->lvb_atime = current_atime;
104 lvb->lvb_ctime = current_ctime;
108 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid,
109 struct lov_stripe_md *lsm, int stripeno, int *set)
111 valid &= src->o_valid;
114 tgt->o_valid &= valid;
115 if (valid & OBD_MD_FLSIZE) {
116 /* this handles sparse files properly */
119 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
120 if (lov_size > tgt->o_size)
121 tgt->o_size = lov_size;
123 if (valid & OBD_MD_FLBLOCKS)
124 tgt->o_blocks += src->o_blocks;
125 if (valid & OBD_MD_FLBLKSZ)
126 tgt->o_blksize += src->o_blksize;
127 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
128 tgt->o_ctime = src->o_ctime;
129 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
130 tgt->o_mtime = src->o_mtime;
131 if (valid & OBD_MD_FLDATAVERSION)
132 tgt->o_data_version += src->o_data_version;
135 if (valid & OBD_MD_FLFLAGS)
136 tgt->o_flags &= src->o_flags;
140 memcpy(tgt, src, sizeof(*tgt));
141 tgt->o_oi = lsm->lsm_oi;
142 tgt->o_valid = valid;
143 if (valid & OBD_MD_FLSIZE)
144 tgt->o_size = lov_stripe_size(lsm, src->o_size,
147 if (valid & OBD_MD_FLFLAGS)
148 tgt->o_flags = src->o_flags;
151 /* data_version needs to be valid on all stripes to be correct! */
152 if (!(valid & OBD_MD_FLDATAVERSION))
153 tgt->o_valid &= ~OBD_MD_FLDATAVERSION;